Video: Cov cawv twg evaporates sai dua?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Rubbing cawv muaj feem ntau ntawm ethanol los yog isopropanol.
Ethanol thiab isopropanol boil ntawm qhov kub qis dua dej, uas feem ntau txhais tau tias lawv yuav evaporate sai dua dua dej. Qhov kub kub yog qhov loj heev txiav txim siab los ntawm kev sib cuam tshuam zoo nkauj ntawm cov kua dej
Xav txog qhov no, qhov twg evaporates sai dua dej lossis cawv?
Raws li cawv evaporates ntawm ntau sai dua tus nqi piv nrog dej vim nws qhov kub qis dua (82 piv rau 100 ° C), nws muaj peev xwm nqa tau cua sov los ntawm daim tawv nqaij. Qhov no txhais tau tias rau lub sijhawm muab sijhawm ntau dua cawv evaporates tshaj dej.
Qhov thib ob, puas isopropyl cawv evaporate sai? Ua kua xws li isopropyl cawv yuav muaj acertain khoom hu ua vapor pressure. Txij li thaum cov molecules feem ntau dawb txav mus los, qee qhov txav mus sai dua tshaj lwm tus thiab muaj peev xwm khiav tawm ntawm cov kua dej. Ntshiab isopropylalcohol yuav ib txwm evaporate tag nrho ntawm roomtemperature nyob rau hauv peb tus qauv huab cua.
Tsis tas li ntawd, qhov twg cov kuab tshuaj evaporates sai tshaj plaws?
TXOJ CAI. Los ntawm kev tshuaj xyuas cov ntaub ntawv no, kuv pom tias NPR (acetone) yuav evaporate ceev tshaj plaws , tom qab byalcohol ces dej; mis nyuj, dej qab zib thiab syrup evaporated kawg, nyob ntawm nws txoj cai lij choj.
Qhov twg evaporates sai dua ethanol lossis acetone?
Acetone evaporates ntau sai dua dua li dej, txawm hais tias nws cov molecular mass yog ntau tshaj peb zaug. Ethanol nthuav tawm hydrogen bonding ntawm ethanol molecules tab sis tsis evaporate sai li dej.
Pom zoo:
Cov ntsia hlau puas yuav xeb sai dua hauv dej ntsev lossis dej tshiab?
Teb: Qhov corrosion ntawm hlau qhia tias muaj tshuaj hloov pauv hauv cov hlau. Rust (hydrous oxide) yog ib qho piv txwv ntawm qhov kev hloov no uas tshwm sim thaum hlau raug dej los yog huab cua ntub. Koj cov ntsia hlau hlau tiag tiag yuav xeb sai dua thiab hnyav hauv dej ntsev
Cov pab pawg twg ntawm cov ntawv teev sijhawm twg yog cov tshuaj chlorine?
Chlorine belongs rau pab pawg neeg ntawm halogens - ntsev tsim - ua ke nrog fluorine (F), bromine (Br), iodine (I) thiab astatine (At). Lawv tag nrho nyob rau hauv kab thib ob los ntawm sab xis ntawm lub rooj sib tham hauv Pawg 17. Lawv cov teeb tsa hluav taws xob zoo sib xws, muaj xya lub tshuab hluav taws xob hauv lawv lub plhaub sab nraud
Txoj kev faib cov ntaub ntawv twg muab cov ntaub ntawv sib npaug ntawm cov ntaub ntawv lossis cov kev tshuaj xyuas hauv txhua chav kawm cov ntaub ntawv?
Quantile. txhua chav kawm muaj cov yam ntxwv sib npaug. Ib qho kev faib tawm ntau yog zoo haum rau cov ntaub ntawv faib tawm. Quantile muab tib tus lej ntawm cov ntaub ntawv muaj nuj nqis rau txhua chav kawm
Vim li cas ethyl cawv muaj qhov kub siab tshaj li methyl cawv?
Ethanol muaj qhov kub siab dua li Methanol.Li no, yuav tsum muaj lub zog ntau dua los kov yeej cov kev sib cuam tshuam, ua rau muaj qhov nce hauv boiling / meltingpoints
Qhov twg yog lub hnub qub sai dua lossis asteroid?
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